Upper Letts Lake Weather Forecast

    • 48
    • 70

    Mostly Sunny

    • 48
    • 55

    Mostly Cloudy

    • 49
    • 55

    Rain Likely

    • 49
    • 54

    Rain Likely

    • 49
    • 59

    Mostly Sunny

    • 51
    • 62

    Mostly Sunny

Today 31 Aug Glenn and Colusa County Coast Range Above 3000 ft

Sunny. Highs 68 to 78. Southeast Winds up to 15 Mph.

Tonight 31 Aug Glenn and Colusa County Coast Range Above 3000 ft

Clear, cooler. Lows 45 to 53. Southwest Winds up to 10 Mph with Gusts to around 20 Mph.

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Upper Letts Lake Temperature Statistics

August Temperature

Ukiah Municipal Airport (28.6 miles)

  • Lowest 29 August, 2026

    48 °F

  • Average August

    76.6 °F

  • Highest 8 August, 2026

    108.6 °F

Climate (2021–2026)

Ukiah Municipal Airport (28.6 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    61 °F

  • Average High 2021–2026

    76.1 °F
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